It's true, doctors are just people. I've worked with a few (both male and female) who actually tipped-toed around in my peripheral vision because they didn't want to bother us!!
You want to ask, "Can I help you with something?"
On the other end there was the legendary Dr. A who threw every bit of his office furniture into a giant pile in the hallway. (if he only knew how much mileage I've gotten out of that story, lol).
The smart ones view us as their colleagues, because they have accurately determined that nurses can and will help them be a better doctor, or conversely make their life very difficult or even "a living hell" in serious cases.
I've read here that facilities are starting to adopt a special form to be filled out by staff if a doctor is abusive. I think that's a great idea. It starts a paper trail and gives the employee some sense of empowerment at least.
If your fellow nurses are giving up chairs to be servile, that isn't good. On the other hand if there were no empty chairs nearby and a nurse chooses to move out of courtesy, he or she should not be faulted as sending the profession back to the Dark Ages.